What is the working principle of the Honda CM400 water pump?
1 Answers
The following is the relevant working principle of the Honda CM400 water pump: 1. Engine power: The engine drives the water pump bearing and impeller through the pulley. The coolant in the water pump is rotated by the impeller and, under centrifugal force, is thrown toward the edge of the water pump housing, generating a certain pressure before flowing out through the outlet or water pipe. 2. Impeller function: The pressure at the center of the impeller decreases as the coolant is thrown outward. The coolant in the radiator is drawn into the impeller through the water pipe due to the pressure difference between the water pump inlet and the impeller center, achieving reciprocating circulation of the coolant. The bearing supporting the water pump shaft is lubricated with grease, so it is necessary to prevent coolant leakage into the grease to avoid emulsification, as well as to prevent grease leakage. 3. Coolant sealing: The sealing measures to prevent leakage in the water pump include the water seal and gasket. The dynamic sealing ring of the water seal is installed between the impeller and the bearing through an interference fit, while the static sealing seat of the water seal is tightly pressed into the water pump housing to seal the coolant. The water pump housing is connected to the engine via a gasket and supports moving components such as the bearing. 4. Drain hole: There is also a drain hole on the water pump housing, located between the water seal and the bearing. If any coolant leaks past the water seal, it can drain out through the drain hole to prevent coolant from entering the bearing chamber, which could damage the bearing lubrication and cause component corrosion. If coolant continues to leak after the engine stops, it indicates that the water seal is damaged.
